TrustWork Proof of Reputation

A privacy-preserving worker reputation system built on Midnight Network.

Workers register a private score on-chain using ZK commitments. Employers verify the score meets a threshold without ever seeing the actual score.

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How it works

1. Worker calls register() — score is committed on-chain using persistentCommit, never stored raw
2. Employer requests verification with a minimum threshold
3. Worker's local proof server generates a ZK proof that score >= threshold
4. Network verifies the proof. Score stays private.

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Project structure

trustwork-proof/
├── contract/
│   └── src/
│       ├── trustwork.compact         # Compact smart contract
│       ├── witnesses.ts              # Private state witness implementations
│       ├── index.ts                  # Contract exports
│       └── managed/trustwork/        # Compiled artifacts (generated)
├── api/
│   ├── tsconfig.json
│   └── src/
│       └── index.ts                  # TypeScript API using Midnight SDK
├── cli/
│   ├── tsconfig.json
│   └── src/
│       ├── index.ts                  # Interactive CLI
│       └── providers.ts              # Wallet + provider setup
└── package.json

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Prerequisites

• Node.js >= 22
• Docker (for the proof server)
• Compact compiler:

curl --proto '=https' --tlsv1.2 -LsSf \
  https://github.com/midnightntwrk/compact/releases/latest/download/compact-installer.sh | sh

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Getting started

git clone https://github.com/barnazaka/trustwork-proof
cd trustwork-proof
npm install

Start the proof server:

docker run -p 6300:6300 midnightntwrk/proof-server:7.0.0 -- midnight-proof-server -v

Compile the contract:

npm run compile-contract

Build:

npm run build

Run:

npm start

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Environment

MIDNIGHT_PROOF_SERVER_URL=http://127.0.0.1:6300
MIDNIGHT_INDEXER_URL=http://127.0.0.1:8088/api/v1/graphql
MIDNIGHT_NODE_URL=http://127.0.0.1:9944

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Built with

• Midnight Network
• Compact
• Midnight JS SDK
• TypeScript